156118domain: NAppears in sequencesG.f.: A(x) = x/(1-x) o x/(1-x^3) o x/(1-x^5) o x/(1-x^7) o..., a composition of functions x/(1-x^(2*n-1)) for n=1,2,3,...at n=25A206720Number of unlabeled semiorders on n points and having dimension at most 2.at n=11A293498